LAKEPORT -- The increasing tensions between Lake County supervisors and Sheriff Frank Rivero could reach a tipping point next week.

Supervisors Rob Brown and Anthony Farrington have requested their colleagues issue a vote of no confidence for the sheriff and ask for his resignation during Tuesday's Board of Supervisors (BOS) meeting.

"It's definitely time. The public is asking for this, and we're just honoring the wishes of the public at this point," Brown said Wednesday.

Rivero vowed to serve out the duration of his term, which expires in January 2015.

"Absolutely I will not resign. I work for the people, not for them," the sheriff said in response to the two supervisors' requests. "This is completely illegitimate. It's just political intrigue and personal vendetta."

In their joint memo to the BOS, Brown and Farrington cite District Attorney Don Anderson's determination that Rivero lied after a 2008 on-duty shooting as the impetus for their current requests.

"After giving careful thought and consideration to this we feel that, as elected leaders, it is our obligation to our constituents that we issue a vote of no confidence and urge Francisco Rivero to step down as Sheriff of Lake County," the two supervisors wrote.

Rivero denies Anderson's untruthfulness claim and has filed a lawsuit challenging the DA's inquiry. "I fully expect to be exonerated and my name cleared," the sheriff added.

Farrington and Brown argued that a host of other issues should compel their colleagues to take a stance against Rivero and protect the integrity of the Lake County Sheriff's Office (LCSO).

In their memo, the pair accused Rivero of needlessly costing taxpayers and abusing other county departments because of "lack of cooperation, ignorance of process, vindictive behavior, lack of understanding of financial matters, excessive supervision and documented dishonesty."

The sheriff denied the allegations and chalked them up to those supervisors being upset "because I won't succumb to them, kiss their ring or join the old boys club."

Rivero added that the accusations from Brown and Farrington puzzled him.

"So they don't want me to supervise this office," Rivero asked. "Lack of financial understanding? How is it that I red-penciled through (the LCSO budget) and found more than $1 million to put back into the general fund in my first year in office?"

"They want to run the sheriff's office," he added.

Differences of opinion between supervisors and Rivero have become commonplace since he took office more than two years ago.

The BOS overturned the terminations of at least three LCSO employees since March 2012.

Last June, Brown motioned for a vote of no confidence for Rivero related to the bargaining agreement with the Lake County Deputy Sheriff's Association, but the BOS took no action.

The sheriff successfully sued the BOS last year for the right to have county-funded independent counsel related to the DA's inquiry into the February 2008 incident, during which Rivero fired a single shot at a suspect.

The LCSO and Lake County DA's Office reportedly investigated the shooting in 2008, and no criminal charges were filed against Rivero, a deputy at the time. Different people headed both offices five years ago; Anderson and Rivero were each elected to first terms in 2010.

The DA contended that if Rivero were untruthful, his credibility as a peace officer could be in doubt -- and that information would need to be given to defendants in criminal cases in which Rivero could testify, under the case of Brady v. Maryland.

Anderson deemed Rivero lied and misled investigators, and as a result, classified the sheriff as a "Brady officer," according to the DA's Office report released publicly March 4.

Rivero sued Anderson in response, arguing the DA's inquiry was insufficient and violated his constitutional rights.

The supervisors continue to debate how much to pay Rivero's counsel, the law firm Jones & Mayer. In its last meeting, the BOS asked the County Counsel's Office to find out from the court if the county is responsible for funding the sheriff's lawyer during his lawsuit against the DA.

Rivero said he thought the no-confidence vote and resignation request were "clearly retaliation" for the supervisors' desire not to pay any more of his legal fees in the Anderson suit.

In making their argument, Farrington and Brown honed in on a section of Rivero's civil complaint, prepared by attorney Ryan R. Jones Feb. 28.

Jones wrote that Rivero would suffer irreparable harm if Anderson were allowed to release his Brady findings "because, once it is released that petitioner (Rivero) is a 'Brady' officer, his reputation will be severely injured and his ability to continue to serve as sheriff or in other law enforcement capacities will be nullified."

Brown and Farrington argue that with the DA's findings public and in light of Jones' argument on behalf of Rivero, "The only remedy ... is for Mr. Rivero to offer his resignation and allow the (BOS) to proceed in appointing a suitable replacement who will restore integrity to the (LCSO)."

Rivero said not only is he staying in office, he is now reconsidering his initial decision to serve just one term as sheriff.

The BOS discussion on a no-confidence vote and resignation request is scheduled for 10 a.m. Tuesday at the Lake County Courthouse in Lakeport. Rivero said he plans to attend.

Jeremy Walsh is a staff reporter for Lake County Publishing. Reach him at 263-5636, ext. 37 or jwalsh@record-bee.com. Follow coverage on Twitter, @JeremyDWalsh or #LakeBOS.